The Blue Water Lily is a tropical aquatic plant with stunning blue flowers and large, circular leaves. It is an herbaceous perennial that has underground rhizomes and leaves on long stalks that float on the surface of the water. The flowers are violet-blue and they are held above the surface of the water. They are star-like and have many narrow petals. It is native to Asia and the Pacific from India to Australia. Hardy in zones 10-12.